
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...

Jul1814 12:32 PM
ChrisVer

187 
58,749 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
25,172 
Hi. I am currently studying about representations of Lie algebras. I have two questions:
1. As I understand, when...

Jul1214 11:00 PM
spookyfish

11 
2,581 
Hello,
I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example,
800...

Jul1014 03:19 PM
mfb

14 
3,247 
I'm stucked in a passage of Particle Physics (Martin B., Shaw G.) in page 41 regarding neutrino oscillations.
...

Jul1014 03:15 PM
George Jones

6 
2,265 
How can someone think of the neutrinos as non relativistic?
OK I understand for example that the neutrino temperature...

Jul914 04:55 PM
Orodruin

13 
3,004 
Wikipedia says CERN has isolated about 38 atoms of antihydrogen and maintained them for over 15 minutes? ... Do you...

Jul914 03:59 PM
SteamKing

5 
2,425 
Annihilation results in an extreme burst of energy..... If enough antimatter is isolated, it can be utilized for...

Jul914 02:49 AM
Syed Ammar

5 
2,130 
Hi
I am trying to find the equations of a charged particle inside a dipole & quadripole. Practically, I need to...

Jul814 09:34 PM
Vanadium 50

6 
1,948 
"The question is very simple: do matter and antimatter obey the same laws of physics?.??

Jul814 02:28 PM
ChrisVer

4 
2,051 
I'm starting to learn about particle physics but I really want to see the whole picture before going deep. Here is...

Jul514 09:46 PM
Trifis

2 
2,112 
Hi!
I try to construct the emission spectrum from relativistic electron rotating in homogeneous magnetic field ...

Jul514 10:06 AM
mfb

3 
1,849 
If uranium 238 is more stable than uranium 235 because 3 extra neutrons add to strong force then uranium 236 having 1...

Jul514 08:11 AM
mfb

5 
3,245 
I know that the nucleus can be considered a bunch of particles that constantly transition between protons and neutrons...

Jul414 05:31 PM
gildomar

3 
2,254 
Suppose we have a superfield \Phi(x,\theta,\bar{\theta}) this can be expanded in component fields in the standard way...

Jul314 01:17 PM
ChrisVer

2 
2,390 
Hi,
is there a way to compute the escape velocity/kinetic energy of a newly created electron/positron pair ? Or in...

Jul214 05:10 PM
mfb

39 
10,551 
Hi I am rereading Srednicki's QFT.
In chapter 58,
he points out that the Noether current $$...

Jun3014 10:21 PM
cedricyu803

2 
2,755 
Hi Board,
In the Spectrum of Co60
...

Jun2914 08:55 PM
echaniot

7 
3,045 
I have a problem with the calculus of magnetic moment of Li6.
The configuration of protons is 1p_{3/2}, and the...

Jun2914 03:17 PM
PeterDonis

4 
2,701 
I have read that for a system of 2 particles, the total parity is given by:
P=P_1 P_2 (1)^L where
 P_1, P_2=...

Jun2814 09:50 AM
bznm

8 
2,205 
To find a new particle, the energy and momentum of the (decayed) particles are measured
Evaluate the expression m^2...

Jun2814 12:56 AM
Simon Bridge

5 
2,369 
Pauli's Principle says:
"The wavefunction of two identical fermions must be totally antisymmetric".
I know...

Jun2814 12:43 AM
Simon Bridge

1 
2,275 
I know that a particle's exact anticounterpart (i.e. an electron and positron) will annihilate into pure energy. But...

Jun2614 06:12 PM
mfb

8 
2,530 
S=\int d^4x\frac{m}{12}A_μ ε^{μ \nu ρσ} H_{\nu ρσ} + \frac{1}{8} m^2A^μA_μ
Where
H_{\nu ρσ} = \partial_\nu B_{ρσ}...

Jun2614 03:31 AM
bagherihan

6 
2,152 
I am sorry, this is a rather dump question more like a notation question since the sources I've looked into don't...

Jun2514 12:41 PM
ChrisVer

4 
611 
I have heard that perturbative quantum gravity calculation predicts an increase of constant G at large distances.
...

Jun2414 06:10 PM
ChrisVer

2 
638 
When I opened up the "High Energy,Nuclear,Particle Physics" section, it was kind of like "Holy $#^*!!! I don't know...

Jun2414 12:44 PM
mfb

4 
661 
Because I am a little tired to think...
For where does the mass difference between the W and Z bosons come from?

Jun2414 12:22 PM
ChrisVer

6 
661 
why the topological term in gauge theory, ε_{\mu\nu ρσ}F^{\mu \nu} F^{ρσ} ,is scaleindependent?

Jun2414 06:20 AM
samalkhaiat

7 
780 
I have a question:
With the detection of the Higgs Boson particle, if one were to remove all said particles from a...

Jun2314 08:43 PM
ChrisVer

10 
1,118 
In the standard model gravitron is a particle but Higgs boson is not. The Higgs field causes particles to acquire...

Jun2114 07:51 PM
mfb

18 
1,297 
Is there anywhere I can see the explicit derivation for a massless real scalar and for the EM field?
thank you.

Jun2114 12:16 PM
samalkhaiat

4 
931 
In case you have the Kahler and super potential K,W:
K(T,S,C) = log (S +S^{*}) 3 log ( T+ T^{*}  C C^{*})
...

Jun1914 07:05 PM
ChrisVer

1 
487 
MIT bag model is a famous model, which can be used for calculating quark distribution function in hadrons. ...

Jun1914 07:30 AM
Chenkb

0 
519 
Specifically in Carl D Anderson's cloud chamber experiment, the first experiment to prove the existence of the...

Jun1814 06:45 PM
kurros

5 
598 
dear sir,
i heard that that proton spins about itselfand this helps in stability of nucleus. i also heard...

Jun1714 02:31 AM
shivakumar06

11 
813 
This article on Majorana particles:
http://news.yahoo.com/huntsourcemattercontinues130052152.html
If neutrinos...

Jun1614 09:45 PM
Matterwave

15 
1,134 
Dear PF,
although I've gone through many particle phyics lectures and text books, I still have problems with wrap...

Jun1514 05:56 PM
kurros

7 
722 
Ok so I recently read this article...

Jun1514 06:01 AM
maajdl

1 
611 
Hi,
While studying Lie groups and in particular the representations I have some trouble with determining whether a...

Jun1414 12:37 PM
JorisL

2 
628 
Such as ##\Sigma^0 \to \bar{\Lambda}\gamma\gamma##.
I want to make a complete collection of all these decay modes,...

Jun1414 11:42 AM
mfb

10 
665 
I have read that the Z boson cannot change the flavour of a particle. So my assumption is that an interaction such as:...

Jun1314 09:31 AM
Orodruin

13 
857 